Harrow-tooth holder



UNrTso STaTss AFnTnNT @erica FRED IV. IjIERRMANN, `OF ATLANTIC, IOVA.

HARRQW-TOOTH HOLDER.

`SPECII`ICACII}N forming part of Letters Patent No. 289,260, dated November 27, 1883,`

Application ledJune15,`1883.

(No mmlcl.)

Vlantic, in the county of Cass and State of Iowa,

have invented certain new and useful Improve- :ments in Harrow-Tooth Holders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and

to the letters and figures of reference marked thereon, which forma part of this specifica- I `elevation of the holder.

This invention relates to improvements in harrow-tooth holders; and it consists in the combination and arrangement of the several parts, hereinafter fully described, and specilically pointed out in the claims.

In the drawings, Figure l is a top or plan 4View of a part of one ofthe harrow-bars,showing 'the fastening-nuts on the ends of the rctaining-bolts. Fig. 2 is a side elevation of a harrow-bar, a tooth-holder fixed thereto, and of the tooth suspended in the holder. Fig. 3 `is al view yof the under end of the holder. Fig. t shows a view of the upper end and a side Fig. 5 shows a side view and an edge view of one of the harrowteeth. Fig. Gis averticalfsection of one ofthe harrow-barsand of a tooth-holder,showing the ooth in position. Fig. 7 shows a tooth having a rectangular head, and Fig. 8 shows a vertical section of a tooth-holder and harrowbar, and the tooth reversed from the position shown in Fig. 6, whereby the said tooth is ocked or held rigidly in a vertical position.

a is the harrow-bar, to which the toothholder is held by bolts a and nuts ci, as

l to the angle commonly given to inclined teeth in harrows. A recess or mortise, b 4, is formed in the top of the holder, and surrounding the upper end of the opening or socket b. This mortise is made preferably wider than the upper end of the opening b. It is, however, not necessary to make it so. It may be of same `width with the mortise; but it should be preferably a little longer, for purposes hereinafter set forth. The bottom of the niortise is on a line or plane transverse to the tooth socket or opening b. rIhe socket is deep enough to receive the head of the tooth, hereinafter described. The holder is provided with perforated lugs bi barranged at opposite ends, as shown, and through them the retaining-bolts a are put in the manner shown. The lugs b5 are not arranged in line with the longest diameter of `the'tooth-socket b', but laterally thereto, the one on one side thereof,` the other on the other side thereof. This lateral'arrangement permits the lugs to be set in line I with the harroW-bar a., and the setting Of the latter to an incline to or across the line of motion of the harrow, and at `the same `time 'preserve the longest diameter of the socket b directly in line with the direction `ot' motion.

. c is the tooth, preferably oval in form, to

adapt it to the shape ofthe opening b', and so that it will present its edge in the direction of the movement of the harrow. A head, c', is formed on the tooth, and is adapted to enter the mortise b* in the holder b, and project past the ends of the oval-shapedopening or socket.

The head c may bemade to set at a right angle to the tooth, or it may be set at an inclined angle thereto, as shown. I prefer to set it at the inclination shown, because when it is reversed, as shown in Fig. 8, it becomes locked in its position-a result that would notv be attained were the head projected at right angles. The head is preferably made in the form shown in Fig. 5, where the upper and under faces are formed in the arc of a circle. This form rocks more freely and gives better results, though very excellent results are derived when the head is made in the forni shown in Fig. 7, or is set at a right angle to the stem of the tooth.

The operation of the device is clearly illustrated in Figs. 6 and 8. The head tilts on one end to permit the tooth to turn back, as shown in dotted lines, Fig. 6, while the other end of the head is elevated and touches the harrow- IOC bar and-prevents the tooth from being pushed upward. When the tooth drops to the vertical position, the opposite end of the head touches the harrow-bar, as shown in full lines, Fig. 6. By reversing the position of the tooth, as shown in Fig. 8, the highest end of the head touches the bar, and the tooth will be locked in a vertical position. Vhen the tooth is provided with a head made at right angles thereto there will be a slight vertical movement of the tooth when it is used in avertical position. It would make a slight noise, caused by this sliding movement; but the general action is the same as that where the head is set at an incline. I prefer the setting of the head Aon an incline, as hereinbefore described.

The harrow-body to which my improved Then a slant tooth is be hitched to the other end.

' I am aware that harrow-tooth holders have y"heretofore been made with one vertical and 'one inclined wall, and the teeth have been secured in said holders, so they may be moved to bear against one or the other of said walls. YI do not claim this, broadly, as my invention 5 bar of a harrow, and having a vertical oblong socket through the holder, with one of its walls lstraight and the opposite wall inclined from its upper end outward and away from the straight wall, and having in its upper face an oblong mortise leading from the upper end of the socket, and adapted to receive the head of 'the tooth and permit the tilting or rocking of said tooth-head, substantially as set forth.

2. A barrow-tooth holder having a vertical loblong socket or opening through it, with one its face a longitudinal mortise leading fromv the oblong socket, and the tooth having an oblong head curved upon its upper and under faces, and adapted to be placed in the oblong mortise and tilt upon its ends, substantially as set forth.

4. A'harrow-tooth holder having a vertical oblong socket or opening through it, with one of its walls straight and its opposite wall in` Vclined, and having in its upper face an oblong mortise leading from the ends of the oblong socket, in combination with a harrow-tooth Ahaving an oblong head set at an incline to the body7 of the tooth and adapted to tilt within the oblong socket, substantially as and for the purposes set forth.

5. A harrow-tooth .holder having a vertical oblong socket formed through it, with one of the walls of the socket straight and the opposite wall inclined, and having in its upper face an oblong mortise leading from the ends of the oblong socket, in combination with a reversible tooth having an oblong head set at an incline to the body of the tooth and adapted to be placed within the oblong socket and tilt upon its end, or be reversed and locked between the tooth-bar and the bottom of the mortise, substantially as and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FRED XV. HERRMANN. Vitnesses:

A. J. GILLEsPIE,

CHARLEs D. Brauns. 

